Menu

Discussion Forum

New Discussion
查找

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Acceleration time history data for seismic analysis

Posted 2018年11月16日 GMT-5 02:40 1 Reply

Sharanbaswa vishwanath
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi all,

Can somebody explain how to apply acceleration time history load for seismic analysis of buildings?

1 Reply Last Post 2018年11月19日 GMT-5 07:21
Henrik Sönnerlind COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 6 years ago 2018年11月19日 GMT-5 07:21

Hi,

If all supports have the same acceleration history, then the most convenient approach is to replace the base acceleration with a gravity load with the same time history. This will work both for direct time integration and mode superposition.

Alternatively, you can use the Prescribed Acceleration feature for directly prescribing the acceleration on the support points. This comes with some extra cost, as an internal integration of acceleration into displacement is needed, and it cannot be used with mode superposition.

Regards,
Henrik

-------------------
Henrik Sönnerlind
COMSOL
Hi, If all supports have the same acceleration history, then the most convenient approach is to replace the base acceleration with a gravity load with the same time history. This will work both for direct time integration and mode superposition. Alternatively, you can use the Prescribed Acceleration feature for directly prescribing the acceleration on the support points. This comes with some extra cost, as an internal integration of acceleration into displacement is needed, and it cannot be used with mode superposition. Regards, Henrik

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content